The 49-year-old singer fought back tears as she opened her show with a somber message for concertgoers. "I hope that you're doing OK," she began. "Before we start the show, I need to talk to you for a moment. ...I never start the show like this but tonight is very different."

Celine Dion performs at The Colosseum in Caesars Palace on Oct. 3 in Las Vegas, Nevada.